188494545553 has 2 divisors, whose sum is σ = 188494545554. Its totient is φ = 188494545552.

The previous prime is 188494545457. The next prime is 188494545559. The reversal of 188494545553 is 355545494881.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158987207824 + 29507337729 = 398732^2 + 171777^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188494545553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 188494545491 and 188494545500.

It is not a weakly prime, because it can be changed into another prime (188494545559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94247272776 + 94247272777.

It is an arithmetic number, because the mean of its divisors is an integer number (94247272777).

Almost surely, 2^188494545553 is an apocalyptic number.

It is an amenable number.

188494545553 is a deficient number, since it is larger than the sum of its proper divisors (1).

188494545553 is an equidigital number, since it uses as much as digits as its factorization.

188494545553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120000, while the sum is 61.

The spelling of 188494545553 in words is "one hundred eighty-eight billion, four hundred ninety-four million, five hundred forty-five thousand, five hundred fifty-three".